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Before building with Claude

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Decide whether to use Claude for support chat

Here are some key indicators that you should employ an LLM like Claude to automate portions of your customer support process:
Some considerations for choosing Claude over other LLMs:
  • You prioritize natural, nuanced conversation: Claude’s sophisticated language understanding allows for more natural, context-aware conversations that feel more human-like than chats with other LLMs.
  • You often receive complex and open-ended queries: Claude can handle a wide range of topics and inquiries without generating canned responses or requiring extensive programming of permutations of user utterances.
  • You need scalable multilingual support: Claude’s multilingual capabilities allow it to engage in conversations in over 200 languages without the need for separate chatbots or extensive translation processes for each supported language.

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Define your ideal chat interaction

Outline an ideal customer interaction to define how and when you expect the customer to interact with Claude. This outline will help to determine the technical requirements of your solution. Here is an example chat interaction for car insurance customer support:
  • Customer: Initiates support chat experience
    • Claude: Warmly greets customer and initiates conversation
  • Customer: Asks about insurance for their new electric car
    • Claude: Provides relevant information about electric vehicle coverage
  • Customer: Asks questions related to unique needs for electric vehicle insurances
    • Claude: Responds with accurate and informative answers and provides links to the sources
  • Customer: Asks off-topic questions unrelated to insurance or cars
    • Claude: Clarifies it does not discuss unrelated topics and steers the user back to car insurance
  • Customer: Expresses interest in an insurance quote
    • Claude: Ask a set of questions to determine the appropriate quote, adapting to their responses
    • Claude: Sends a request to use the quote generation API tool along with necessary information collected from the user
    • Claude: Receives the response information from the API tool use, synthesizes the information into a natural response, and presents the provided quote to the user
  • Customer: Asks follow up questions
    • Claude: Answers follow up questions as needed
    • Claude: Guides the customer to the next steps in the insurance process and closes out the conversation
In the real example that you write for your own use case, you might find it useful to write out the actual words in this interaction so that you can also get a sense of the ideal tone, response length, and level of detail you want Claude to have.

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Break the interaction into unique tasks

Customer support chat is a collection of multiple different tasks, from question answering to information retrieval to taking action on requests, wrapped up in a single customer interaction. Before you start building, break down your ideal customer interaction into every task you want Claude to be able to perform. This ensures you can prompt and evaluate Claude for every task, and gives you a good sense of the range of interactions you need to account for when writing test cases.
Customers sometimes find it helpful to visualize this as an interaction flowchart of possible conversation inflection points depending on user requests.
Here are the key tasks associated with the example insurance interaction above:
  1. Greeting and general guidance
    • Warmly greet the customer and initiate conversation
    • Provide general information about the company and interaction
  2. Product Information
    • Provide information about electric vehicle coverage
      This will require that Claude have the necessary information in its context, and might imply that a RAG integration is necessary.
    • Answer questions related to unique electric vehicle insurance needs
    • Answer follow-up questions about the quote or insurance details
    • Offer links to sources when appropriate
  3. Conversation Management
    • Stay on topic (car insurance)
    • Redirect off-topic questions back to relevant subjects
  4. Quote Generation
    • Ask appropriate questions to determine quote eligibility
    • Adapt questions based on customer responses
    • Submit collected information to quote generation API
    • Present the provided quote to the customer

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Establish success criteria

Work with your support team to define clear success criteria and write detailed evaluations with measurable benchmarks and goals. Here are criteria and benchmarks that can be used to evaluate how successfully Claude performs the defined tasks:
Here are criteria and benchmarks that can be used to evaluate the business impact of employing Claude for support:

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How to implement Claude as a customer service agent

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Choose the right Claude model

The choice of model depends on the trade-offs between cost, accuracy, and response time. For customer support chat, claude-opus-4-1-20250805 is well suited to balance intelligence, latency, and cost. However, for instances where you have conversation flow with multiple prompts including RAG, tool use, and/or long-context prompts, claude-3-haiku-20240307 may be more suitable to optimize for latency.

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Build a strong prompt

Using Claude for customer support requires Claude having enough direction and context to respond appropriately, while having enough flexibility to handle a wide range of customer inquiries. Let’s start by writing the elements of a strong prompt, starting with a system prompt: 
IDENTITY = """You are Eva, a friendly and knowledgeable AI assistant for Acme Insurance 
Company. Your role is to warmly welcome customers and provide information on 
Acme's insurance offerings, which include car insurance and electric car 
insurance. You can also help customers get quotes for their insurance needs."""
While you may be tempted to put all your information inside a system prompt as a way to separate instructions from the user conversation, Claude actually works best with the bulk of its prompt content written inside the first User turn (with the only exception being role prompting). Read more at Giving Claude a role with a system prompt.
It’s best to break down complex prompts into subsections and write one part at a time. For each task, you might find greater success by following a step by step process to define the parts of the prompt Claude would need to do the task well. For this car insurance customer support example, we’ll be writing piecemeal all the parts for a prompt starting with the “Greeting and general guidance” task. This also makes debugging your prompt easier as you can more quickly adjust individual parts of the overall prompt. We’ll put all of these pieces in a file called config.py. 
STATIC_GREETINGS_AND_GENERAL = """
<static_context>
Acme Auto Insurance: Your Trusted Companion on the Road

About:
At Acme Insurance, we understand that your vehicle is more than just a mode of transportation—it's your ticket to life's adventures. 
Since 1985, we've been crafting auto insurance policies that give drivers the confidence to explore, commute, and travel with peace of mind.
Whether you're navigating city streets or embarking on cross-country road trips, Acme is there to protect you and your vehicle. 
Our innovative auto insurance policies are designed to adapt to your unique needs, covering everything from fender benders to major collisions.
With Acme's award-winning customer service and swift claim resolution, you can focus on the joy of driving while we handle the rest. 
We're not just an insurance provider—we're your co-pilot in life's journeys.
Choose Acme Auto Insurance and experience the assurance that comes with superior coverage and genuine care. Because at Acme, we don't just 
insure your car—we fuel your adventures on the open road.

Note: We also offer specialized coverage for electric vehicles, ensuring that drivers of all car types can benefit from our protection.

Acme Insurance offers the following products:
- Car insurance
- Electric car insurance
- Two-wheeler insurance

Business hours: Monday-Friday, 9 AM - 5 PM EST
Customer service number: 1-800-123-4567
</static_context>
"""
We’ll then do the same for our car insurance and electric car insurance information. 
STATIC_CAR_INSURANCE="""
<static_context>
Car Insurance Coverage:
Acme's car insurance policies typically cover:
1. Liability coverage: Pays for bodily injury and property damage you cause to others.
2. Collision coverage: Pays for damage to your car in an accident.
3. Comprehensive coverage: Pays for damage to your car from non-collision incidents.
4. Medical payments coverage: Pays for medical expenses after an accident.
5. Uninsured/underinsured motorist coverage: Protects you if you're hit by a driver with insufficient insurance.

Optional coverages include:
- Rental car reimbursement
- Roadside assistance
- New car replacement
</static_context>
"""

STATIC_ELECTRIC_CAR_INSURANCE="""
<static_context>
Electric Car Insurance:
Our specialized electric car insurance goes beyond traditional auto coverage, 
offering tailored protection for your high-tech investment. In addition to standard coverages, we offer:
- Safeguarding expensive battery systems
- Covering home charging equipment
- Adapting to the rapidly evolving world of electric vehicles

Whether you're driving a Rivian, Nissan Leaf, Chevrolet Bolt, 
or any other electric vehicle, our knowledgeable agents are ready to craft a policy 
that gives you the confidence to enjoy every electron-powered mile.
</static_context>
"""
Now that we have our static content, let’s add at least 4-5 sample “good” interactions to guide Claude’s responses. These examples should be representative of your ideal customer interaction and can include guardrails, tool calls, etc. 
EXAMPLES="""
Here are a few examples of how you can interact with customers:

<example 1>
H: Hi, do you offer commercial insurance for small businesses?

A: Ah! Unfortunately, we don't offer commercial insurance at this time. 
However, we do provide a range of personal insurance products including car insurance and electric car insurance. 
Would you like to know more about these offerings?
</example 1>

<example 2>
H: Hi, what are your business hours?

A: Our business hours are Monday to Friday, 9 AM to 5 PM EST. 
If you have any questions or need assistance, feel free to reach out during those times. 
How else can I assist you today?
</example 2>

<example 3>
H: I'm shopping for car insurance. What does Acme offer?

A: Great choice! Acme's car insurance policies typically include:
- Liability coverage: Protects you if you're at fault in an accident
- Collision coverage: Pays for damage to your car in an accident
- Comprehensive coverage: Covers non-collision incidents like theft or vandalism
- Medical payments coverage: Pays for medical expenses after an accident
- Uninsured/underinsured motorist coverage: Protects you from drivers with insufficient insurance

We also offer optional coverages like rental car reimbursement, roadside assistance, and new car replacement. 
Would you like more details on any of these coverages, or do you have specific questions about insuring your vehicle?
</example 3>

<example 4>
H: I'd like to hear about your electric car insurance.

A: Certainly! Our electric car insurance is specially designed to meet the unique needs of electric vehicle owners. 
In addition to all the standard coverages we offer for regular cars, our electric car policies include:

- Battery coverage: Protection against damage or degradation of your vehicle's expensive battery system
- Tech package: Covers repairs or replacement of advanced electronics and onboard computer systems
- Charging station coverage: Protects both home and portable charging equipment
- Cybersecurity protection: Coverage against hacking or digital threats
- Specialized roadside assistance: Includes flatbed towing to protect the vehicle's undercarriage

We cover a wide range of electric vehicles, including popular models from Tesla, Rivian, Nissan, Chevrolet, and more. 
Is there a specific electric vehicle you're looking to insure, or would you like more details on any of these coverages?
</example 4>

<example 5>
H: I'd like to get a quote for my car insurance.

A: Certainly! I'd be happy to help you get a quote for your car insurance. 
To provide you with an accurate quote, I'll need to collect some information about your vehicle and the primary driver. 
Let's start with the basics:

1. What is the make and model of your vehicle?
2. What year was it manufactured?
3. Approximately how many miles have you driven?
4. What is the age of the primary driver?

Once you provide this information, I'll use our quoting tool to generate a personalized insurance quote for you.
</example 5>
"""
You will also want to include any important instructions outlining Do’s and Don’ts for how Claude should interact with the customer. This may draw from brand guardrails or support policies. 
ADDITIONAL_GUARDRAILS = """Please adhere to the following guardrails:
1. Only provide information about insurance types listed in our offerings.
2. If asked about an insurance type we don't offer, politely state 
that we don't provide that service.
3. Do not speculate about future product offerings or company plans.
4. Don't make promises or enter into agreements it's not authorized to make.
You only provide information and guidance.
5. Do not mention any competitor's products or services.
"""
Now let’s combine all these sections into a single string to use as our prompt. 
TASK_SPECIFIC_INSTRUCTIONS = ' '.join([
   STATIC_GREETINGS_AND_GENERAL,
   STATIC_CAR_INSURANCE,
   STATIC_ELECTRIC_CAR_INSURANCE,
   EXAMPLES,
   ADDITIONAL_GUARDRAILS,
])

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Add dynamic and agentic capabilities with tool use

Claude is capable of taking actions and retrieving information dynamically using client-side tool use functionality. Start by listing any external tools or APIs the prompt should utilize. For this example, we will start with one tool for calculating the quote.
As a reminder, this tool will not perform the actual calculation, it will just signal to the application that a tool should be used with whatever arguments specified.
Example insurance quote calculator: 
TOOLS = [{
  "name": "get_quote",
  "description": "Calculate the insurance quote based on user input. Returned value is per month premium.",
  "input_schema": {
    "type": "object",
    "properties": {
      "make": {"type": "string", "description": "The make of the vehicle."},
      "model": {"type": "string", "description": "The model of the vehicle."},
      "year": {"type": "integer", "description": "The year the vehicle was manufactured."},
      "mileage": {"type": "integer", "description": "The mileage on the vehicle."},
      "driver_age": {"type": "integer", "description": "The age of the primary driver."}
    },
    "required": ["make", "model", "year", "mileage", "driver_age"]
  }
}]

def get_quote(make, model, year, mileage, driver_age):
    """Returns the premium per month in USD"""
    # You can call an http endpoint or a database to get the quote.
    # Here, we simulate a delay of 1 seconds and return a fixed quote of 100.
    time.sleep(1)
    return 100

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Deploy your prompts

It’s hard to know how well your prompt works without deploying it in a test production setting and running evaluations so let’s build a small application using our prompt, the Anthropic SDK, and streamlit for a user interface. In a file called chatbot.py, start by setting up the ChatBot class, which will encapsulate the interactions with the Anthropic SDK. The class should have two main methods: generate_message and process_user_input. 
from anthropic import Anthropic
from config import IDENTITY, TOOLS, MODEL, get_quote
from dotenv import load_dotenv

load_dotenv()

class ChatBot:
   def __init__(self, session_state):
       self.anthropic = Anthropic()
       self.session_state = session_state

   def generate_message(
       self,
       messages,
       max_tokens,
   ):
       try:
           response = self.anthropic.messages.create(
               model=MODEL,
               system=IDENTITY,
               max_tokens=max_tokens,
               messages=messages,
               tools=TOOLS,
           )
           return response
       except Exception as e:
           return {"error": str(e)}

   def process_user_input(self, user_input):
       self.session_state.messages.append({"role": "user", "content": user_input})

       response_message = self.generate_message(
           messages=self.session_state.messages,
           max_tokens=2048,
       )

       if "error" in response_message:
           return f"An error occurred: {response_message['error']}"

       if response_message.content[-1].type == "tool_use":
           tool_use = response_message.content[-1]
           func_name = tool_use.name
           func_params = tool_use.input
           tool_use_id = tool_use.id

           result = self.handle_tool_use(func_name, func_params)
           self.session_state.messages.append(
               {"role": "assistant", "content": response_message.content}
           )
           self.session_state.messages.append({
               "role": "user",
               "content": [{
                   "type": "tool_result",
                   "tool_use_id": tool_use_id,
                   "content": f"{result}",
               }],
           })

           follow_up_response = self.generate_message(
               messages=self.session_state.messages,
               max_tokens=2048,
           )

           if "error" in follow_up_response:
               return f"An error occurred: {follow_up_response['error']}"

           response_text = follow_up_response.content[0].text
           self.session_state.messages.append(
               {"role": "assistant", "content": response_text}
           )
           return response_text
      
       elif response_message.content[0].type == "text":
           response_text = response_message.content[0].text
           self.session_state.messages.append(
               {"role": "assistant", "content": response_text}
           )
           return response_text
      
       else:
           raise Exception("An error occurred: Unexpected response type")

   def handle_tool_use(self, func_name, func_params):
       if func_name == "get_quote":
           premium = get_quote(**func_params)
           return f"Quote generated: ${premium:.2f} per month"
      
       raise Exception("An unexpected tool was used")

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Build your user interface

Test deploying this code with Streamlit using a main method. This main() function sets up a Streamlit-based chat interface. We’ll do this in a file called app.py 
import streamlit as st
from chatbot import ChatBot
from config import TASK_SPECIFIC_INSTRUCTIONS

def main():
   st.title("Chat with Eva, Acme Insurance Company's Assistant🤖")

   if "messages" not in st.session_state:
       st.session_state.messages = [
           {'role': "user", "content": TASK_SPECIFIC_INSTRUCTIONS},
           {'role': "assistant", "content": "Understood"},
       ]

   chatbot = ChatBot(st.session_state)

   # Display user and assistant messages skipping the first two
   for message in st.session_state.messages[2:]:
       # ignore tool use blocks
       if isinstance(message["content"], str):
           with st.chat_message(message["role"]):
               st.markdown(message["content"])

   if user_msg := st.chat_input("Type your message here..."):
       st.chat_message("user").markdown(user_msg)

       with st.chat_message("assistant"):
           with st.spinner("Eva is thinking..."):
               response_placeholder = st.empty()
               full_response = chatbot.process_user_input(user_msg)
               response_placeholder.markdown(full_response)

if __name__ == "__main__":
   main()
Run the program with: 
streamlit run app.py

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Evaluate your prompts

Prompting often requires testing and optimization for it to be production ready. To determine the readiness of your solution, evaluate the chatbot performance using a systematic process combining quantitative and qualitative methods. Creating a strong empirical evaluation based on your defined success criteria will allow you to optimize your prompts.
The Anthropic Console now features an Evaluation tool that allows you to test your prompts under various scenarios.

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Improve performance

In complex scenarios, it may be helpful to consider additional strategies to improve performance beyond standard prompt engineering techniques & guardrail implementation strategies. Here are some common scenarios:

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Reduce long context latency with RAG

When dealing with large amounts of static and dynamic context, including all information in the prompt can lead to high costs, slower response times, and reaching context window limits. In this scenario, implementing Retrieval Augmented Generation (RAG) techniques can significantly improve performance and efficiency. By using embedding models like Voyage to convert information into vector representations, you can create a more scalable and responsive system. This approach allows for dynamic retrieval of relevant information based on the current query, rather than including all possible context in every prompt. Implementing RAG for support use cases RAG recipe has been shown to increase accuracy, reduce response times, and reduce API costs in systems with extensive context requirements.

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Integrate real-time data with tool use

When dealing with queries that require real-time information, such as account balances or policy details, embedding-based RAG approaches are not sufficient. Instead, you can leverage tool use to significantly enhance your chatbot’s ability to provide accurate, real-time responses. For example, you can use tool use to look up customer information, retrieve order details, and cancel orders on behalf of the customer. This approach, outlined in our tool use: customer service agent recipe, allows you to seamlessly integrate live data into your Claude’s responses and provide a more personalized and efficient customer experience.

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Strengthen input and output guardrails

When deploying a chatbot, especially in customer service scenarios, it’s crucial to prevent risks associated with misuse, out-of-scope queries, and inappropriate responses. While Claude is inherently resilient to such scenarios, here are additional steps to strengthen your chatbot guardrails:
  • Reduce hallucination: Implement fact-checking mechanisms and citations to ground responses in provided information.
  • Cross-check information: Verify that the agent’s responses align with your company’s policies and known facts.
  • Avoid contractual commitments: Ensure the agent doesn’t make promises or enter into agreements it’s not authorized to make.
  • Mitigate jailbreaks: Use methods like harmlessness screens and input validation to prevent users from exploiting model vulnerabilities, aiming to generate inappropriate content.
  • Avoid mentioning competitors: Implement a competitor mention filter to maintain brand focus and not mention any competitor’s products or services.
  • Keep Claude in character: Prevent Claude from changing their style of context, even during long, complex interactions.
  • Remove Personally Identifiable Information (PII): Unless explicitly required and authorized, strip out any PII from responses.

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Reduce perceived response time with streaming

When dealing with potentially lengthy responses, implementing streaming can significantly improve user engagement and satisfaction. In this scenario, users receive the answer progressively instead of waiting for the entire response to be generated. Here is how to implement streaming:
  1. Use the Anthropic Streaming API to support streaming responses.
  2. Set up your frontend to handle incoming chunks of text.
  3. Display each chunk as it arrives, simulating real-time typing.
  4. Implement a mechanism to save the full response, allowing users to view it if they navigate away and return.
In some cases, streaming enables the use of more advanced models with higher base latencies, as the progressive display mitigates the impact of longer processing times.

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Scale your Chatbot

As the complexity of your Chatbot grows, your application architecture can evolve to match. Before you add further layers to your architecture, consider the following less exhaustive options:
  • Ensure that you are making the most out of your prompts and optimizing through prompt engineering. Use our prompt engineering guides to write the most effective prompts.
  • Add additional tools to the prompt (which can include prompt chains) and see if you can achieve the functionality required.
If your Chatbot handles incredibly varied tasks, you may want to consider adding a separate intent classifier to route the initial customer query. For the existing application, this would involve creating a decision tree that would route customer queries through the classifier and then to specialized conversations (with their own set of tools and system prompts). Note, this method requires an additional call to Claude that can increase latency.

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Integrate Claude into your support workflow

While our examples have focused on Python functions callable within a Streamlit environment, deploying Claude for real-time support chatbot requires an API service. Here’s how you can approach this:
  1. Create an API wrapper: Develop a simple API wrapper around your classification function. For example, you can use Flask API or Fast API to wrap your code into a HTTP Service. Your HTTP service could accept the user input and return the Assistant response in its entirety. Thus, your service could have the following characteristics:
    • Server-Sent Events (SSE): SSE allows for real-time streaming of responses from the server to the client. This is crucial for providing a smooth, interactive experience when working with LLMs.
    • Caching: Implementing caching can significantly improve response times and reduce unnecessary API calls.
    • Context retention: Maintaining context when a user navigates away and returns is important for continuity in conversations.
  2. Build a web interface: Implement a user-friendly web UI for interacting with the Claude-powered agent.

Retrieval Augmented Generation (RAG) cookbook

Visit our RAG cookbook recipe for more example code and detailed guidance.

Citations cookbook

Explore our Citations cookbook recipe for how to ensure accuracy and explainability of information.